Kadnar lost control of her 2008 Honda Pilot at 9:50 a.m. Saturday and was ejected from the SUV when it slammed into an embankment near the intersection of Anderson Avenue, police said Monday. She suffered fatal head injuries and was pronounced dead at Phelps Memorial Hospital Center on Saturday.

Sleepy Hollow police are still working with the Westchester County Police Accident Investigation Unit to figure out what caused the crash.

Kadnar worked at SPARC in Yorktown Heights, an agency that offers social, recreational and therapeutic services to the developmentally disabled. Executive Director Rose Rothe said Kadnar's coworkers are deeply mourning the loss of an employee who always provided motivation and help to everyone at SPARC.

"Cathy was a ray of sunshine. She was never without a smile on her face," said Rothe, adding that the organization plans to create a leadership award in Kadnar's memory. "She meant something to so many people."

Kadnar is survived by her young son, Steven M. Zaicek, and her fiance, Andrew Buscetto, according to the Coffey Funeral Home. Kadnar's husband, Steven P. Zaicek, was killed three years ago from a fishing boat accident in Orange County.

Kadnar graduated from Sleepy Hollow High School in 1993 and was a lifelong village resident.

Visitation services will be at the Coffey Funeral Home, 91 N. Broadway in Tarrytown, on Tuesday from 2 to 4 p.m. and 7 to 9 p.m. Her funeral mass will be held on Wednesday at the Transfiguration Church, 268 S. Broadway, at a time to be announced. Interment will be private.